so took the charger on a big drive today, then...

[coloradodave]

All distributors made for street use have mechanical advance. SOME distributors ALSO have a vacuum advance can. This covers stock as well as aftermarket units. You CAN use either on a street car. They will both run great. The vacuum can models offer a few benefits for a street/strip car, such as better cooling and better economy.

 

[mopar12372]

Did you check fuel pressure? Could be running lean

 

[WileE]

What I am referring to is the Canister that is in place for Vacuum Advance verses no Canister which means Mechanical Advance. To say that "Every" one is a Mechanical Advance is just not true. Stock Distributors on our Mopars came from the Factory with Vacuum advances which is a hose running from the Distributor Canister to the Carburetor Vacuum Port. The Canister can be adjusted along with the timing to help in operation of the motor. You might want to look a little closer at what is fact verses what you are stating....Unless we are talking about 2 very different and un-related pieces of equipment...

You're differentiating between a vacuum advance distributor vs. a mechanical advance distributor, OK. But what Greg says is absolutely correct, BOTH have the mechanical advance which are centrifugal weights which adjust timing by rpm... the vacuum advance distributors ALSO have the canister which adjusts timing by vacuum, whether full or ported.

 

[benno440]

pressure is set at 7 psi,

i have been getting alot of help from the guys at pro-touring.com

he told me i need to jet the dual carbs done to the .83 jets as i am running too rich.
also suggested i put the black bushing in the msd dizzy and get rid of one of the stiff siler springs and use 1 soft silver spring. which limits advance at 18* and then go ahead and set intial at 19* and see how it runs and go from there, just waiting for my new jets to turn up.

it definetly runs too rich as it fouls the plugs and burns your eyes, and you can see fuel smoke coming out thew pipes at idle.

 

[cr8crshr]

You're differentiating between a vacuum advance distributor vs. a mechanical advance distributor, OK. But what Greg says is absolutely correct, BOTH have the mechanical advance which are centrifugal weights which adjust timing by rpm... the vacuum advance distributors ALSO have the canister which adjusts timing by vacuum, whether full or ported.

OK...Now I understand where he is coming from. I am still somewhat a novice when it comes to a lot of the nuances to this hobby. I guess for simplicity sake I should have said that a Distributor with a Vacuum Advance Canister more times than not will perform better on a purely street set up and is preferable than to just a straight Mechanical Advance. At least that is what I have been led to believe....

 

[coloradodave]

Please re-read post #21. Set up the same, a mechanical advance only verses a mechanical advance with a vacuum can will be identical, performance wise. Neither has an advantage. If you study the original article by the GM engineer who was instrumental in designing the 'smog' motor distributors, you'll see what the advantages are to a street or street/strip motor, but 'performance' isn't one of them.